272 lines
14 KiB
JSON
272 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-46751",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-09-11T15:12:18.268Z",
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"datePublished": "2024-09-18T07:12:11.240Z",
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"dateUpdated": "2026-08-05T11:38:21.347Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:38:21.347Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()\n\nInstead of doing a BUG_ON() handle the error by returning -EUCLEAN,\naborting the transaction and logging an error message."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached through a locally attached btrfs filesystem — a crafted image on a USB stick, loop-mounted file, or container/VM disk image — and then driven by ordinary local file writes or subvolume deletion. There is no network-facing consumer of btrfs_lookup_extent_info().\nAC:L - The triggering condition is a static, fully attacker-controlled on-disk value (extent item refs == 0) that the tree checker does not reject, so the crafted image deterministically hits the BUG_ON on the first COW or snapshot-delete of the affected block. No race, timing window, or memory-layout dependency is involved.\nPR:L - Once a crafted or inconsistent btrfs is mounted — routinely via desktop/kiosk automount (udisks2/systemd), shared storage, or container images — any unprivileged local user with write access drives btrfs_force_cow_block()/btrfs_drop_snapshot() into the assertion; no capability check gates the path.\nUI:N - After the filesystem is present, the attacker triggers the fault entirely through their own file writes or a subvolume delete, with no action required from any other user. Automount removes the need for a victim to explicitly mount the device.\nS:U - The crash and any resulting metadata corruption are confined to the kernel and the affected btrfs filesystem, within the same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The assertion is btrfs's last line of defense before operating on an extent with broken reference bookkeeping; when it is bypassed (CONFIG_BUG=n embedded/IoT builds) update_ref_for_cow() takes the last-reference path and frees a still-referenced tree block, producing cross-linked extents that expose one file's or subvolume's data through another. The oops itself also dumps kernel registers, stack contents, and pointers to the log.\nI:H - Continuing past a zero refcount causes btrfs to free and re-allocate live metadata blocks, giving the attacker arbitrary corruption of extent-tree and file data belonging to other users on the filesystem. The oops additionally aborts a transaction mid-flight, leaving on-disk state inconsistent.\nA:H - BUG_ON() panics the kernel outright under panic_on_oops; otherwise the task is killed while still holding delayed_refs->lock, head->mutex, and tree locks, so every subsequent delayed-ref operation on that filesystem spins or blocks forever — an unrecoverable filesystem-wide hang and potential hard lockup, which is exactly why the fix unlocks all three before returning -EUCLEAN."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/extent-tree.c"
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],
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"versions": [
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "9c309d2434abbe880712af7e60da9ead8b6703fe",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "d64807ded1b6054f066e03d8add6d920f3db9e5d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "18eb53a2734ff61b9a72c4fef5db7b38cb48ae16",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "3cfec712a439c5c5f5c718c5c669ee41a898f776",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "ef9a8b73c8b60b27d9db4787e624a3438ffe8428",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0",
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"lessThan": "28cb13f29faf6290597b24b728dc3100c019356f",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/extent-tree.c"
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],
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"versions": [
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{
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"version": "2.6.31",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.31",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.238",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.184",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.140",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.92",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.10",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "5.10.238"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "5.15.184"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "6.1.140"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "6.6.92"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "6.10.10"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.31",
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"versionEndExcluding": "6.11"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/9c309d2434abbe880712af7e60da9ead8b6703fe"
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},
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{
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"url": "https://git.kernel.org/stable/c/d64807ded1b6054f066e03d8add6d920f3db9e5d"
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},
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{
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"url": "https://git.kernel.org/stable/c/18eb53a2734ff61b9a72c4fef5db7b38cb48ae16"
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},
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{
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"url": "https://git.kernel.org/stable/c/3cfec712a439c5c5f5c718c5c669ee41a898f776"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef9a8b73c8b60b27d9db4787e624a3438ffe8428"
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},
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{
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"url": "https://git.kernel.org/stable/c/28cb13f29faf6290597b24b728dc3100c019356f"
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}
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],
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"title": "btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-29T14:47:35.151913Z",
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"id": "CVE-2024-46751",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-29T14:47:50.614Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:31:02.648Z"
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}
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}
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]
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}
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} |